Old Greenwich, CT Demographics

A map of Old Greenwich's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	5,305	5,453	76.5%	78.3%
Asian	638	514	9.2%	7.4%
Hispanic	502	484	7.2%	7.0%
Multiracial	446	382	6.4%	5.5%
Black	33	65	0.5%	0.9%
Native American/Other	12	64	0.2%	0.9%

Old Greenwich, Connecticut has an estimated population of 6,936, a less than 1% change from the 6,962 recorded in the 2020 Census. The population is 76.5% White, 9.2% Asian, 7.2% Hispanic, 6.4% Multiracial, 0.5% Black, and 0.2% Native American/Other. This demographic dot map shows the population of Old Greenwich, with one dot drawn for each person counted by the Census, color-coded by race.

Old Greenwich has become more racially diverse since the 2020 Census. It is considerably less diverse than Connecticut overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Old Greenwich, that probability was 37.3% in 2020 and 39.7% in the most recent ACS estimates.

Old Greenwich is ranked the 53rd most populous place in Connecticut, out of 215 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Old Greenwich was ranked the 51st most populous place in the 2020 Census.

Old Greenwich's White Population

5,305 residents of Old Greenwich, or 76.5% of the population, identify as White. The share of White residents in Old Greenwich is considerably higher than in Connecticut overall, where 61.9% of the population is White. Old Greenwich ranks 146th statewide in terms of White residents as a share of the population, out of 215 places.

Since the 2020 Census, Old Greenwich's White population has declined by an estimated 2.7%. White residents' share of Old Greenwich's population has decreased from 78.3% to 76.5%.

Old Greenwich is more White than neighboring Riverside (61.9% White), Cos Cob (64.4% White), Greenwich (63.4% White), and Stamford (43.2% White). Old Greenwich is less White than neighboring Indian Field (91.5% White).

Old Greenwich's Black Population

33 residents of Old Greenwich, or 0.5% of the population, identify as Black. The share of Black residents in Old Greenwich is lower than in Connecticut overall, where 9.8% of the population is Black. Old Greenwich ranks 157th statewide in terms of Black residents as a share of the population, out of 215 places.

Since the 2020 Census, Old Greenwich's Black population has declined by an estimated 49.2%. Black residents' share of Old Greenwich's population has remained roughly unchanged at 0.5%.

Old Greenwich is more Black than neighboring Indian Field (0% Black). Old Greenwich is less Black than neighboring Riverside (3% Black), Cos Cob (3.1% Black), Greenwich (4.4% Black), and Stamford (17.7% Black).

Old Greenwich's Asian Population

638 residents of Old Greenwich, or 9.2% of the population, identify as Asian. The share of Asian residents in Old Greenwich is slightly higher than in Connecticut overall, where 4.7% of the population is Asian. Old Greenwich ranks 17th statewide in terms of Asian residents as a share of the population, out of 215 places.

Since the 2020 Census, Old Greenwich's Asian population has grown by an estimated 24.1%. Asian residents' share of Old Greenwich's population has increased from 7.4% to 9.2%.

Old Greenwich is more Asian than neighboring Indian Field (3.1% Asian), Cos Cob (6.5% Asian), Greenwich (6.1% Asian), and Stamford (7.3% Asian). Old Greenwich is less Asian than neighboring Riverside (13% Asian).

Old Greenwich's Hispanic Population

502 residents of Old Greenwich, or 7.2% of the population, identify as Hispanic. The share of Hispanic residents in Old Greenwich is considerably lower than in Connecticut overall, where 18.3% of the population is Hispanic. Old Greenwich ranks 99th statewide in terms of Hispanic residents as a share of the population, out of 215 places.

Since the 2020 Census, Old Greenwich's Hispanic population has grown by an estimated 3.7%. Hispanic residents' share of Old Greenwich's population has remained roughly unchanged at 7.2%.

Old Greenwich is more Hispanic than neighboring Indian Field (1.8% Hispanic). Old Greenwich is less Hispanic than neighboring Riverside (15% Hispanic), Cos Cob (15% Hispanic), Greenwich (16.1% Hispanic), and Stamford (28.3% Hispanic).

Old Greenwich's Native American/Other Population

12 residents of Old Greenwich, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Old Greenwich is comparable to the share in Connecticut overall, where 1% of the population is Native American/Other. Old Greenwich ranks 48th statewide in terms of Native American/Other residents as a share of the population, out of 215 places.

Since the 2020 Census, Old Greenwich's Native American/Other population has declined by an estimated 81.3%. Native American/Other residents' share of Old Greenwich's population has decreased from 0.9% to 0.2%.

Old Greenwich is more Native American/Other than neighboring Indian Field (0% Native American/Other). Old Greenwich is less Native American/Other than neighboring Riverside (0.6% Native American/Other), Cos Cob (0.5% Native American/Other), Greenwich (6.3% Native American/Other), and Stamford (0.7% Native American/Other).

Old Greenwich's Multiracial Population

446 residents of Old Greenwich, or 6.4% of the population, identify as Multiracial. The share of Multiracial residents in Old Greenwich is slightly higher than in Connecticut overall, where 4.3% of the population is Multiracial. Old Greenwich ranks 32nd statewide in terms of Multiracial residents as a share of the population, out of 215 places.

Since the 2020 Census, Old Greenwich's Multiracial population has grown by an estimated 16.8%. Multiracial residents' share of Old Greenwich's population has increased from 5.5% to 6.4%.

Old Greenwich is more Multiracial than neighboring Indian Field (3.6% Multiracial), Greenwich (3.7% Multiracial), and Stamford (2.8% Multiracial). Old Greenwich is less Multiracial than neighboring Riverside (6.5% Multiracial), and Cos Cob (10.4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.